As far as I can tell, there's not much over here that you can take any car, put some safety equipment in and go race. There's rallycross and banger racing, but nothing like a dedicated series like the SCCA, autocross or even Targa Tasmania in Au that you can just rock up to and race in a lesser class. Even rally has pretty tight regulations if you actually want to compete against other people.

If I've missed the point of the SCCA, or someone can point out to me a series in the UK that I could enter anything in, please do prove me wrong.